Internal-combustion engine



Oct. 23 1923. 1,471,743

W. H. LEGATE INTERNAL CMBUSTION ENGINE Filed aan. 24, 1920 v Parenteel@ce 23, i923.

mitm

WILLIAM HENRY LEGATE, 0F HARTFORD, CONNECTICUT.

INTERNAL-COMBUSTION ENGINE.

Application led January 24, 1920, Serial No. 353,669.

To all whom t may concern.:

Be it known that-I, WILLIAM H. LEGATE, a citizen of the United States,residing' in Hartford, in the count-y of Hartford and State ofConnecticut, have invented a new and Improved Internal-CombustionEngine, of which the following is a specification.

My invention relates to the type of engines above named, and an objectof my invention, among others, is to provide an engine of -this typethat shall have means for reducing or practically eliminating thecollection of carbon and other impurities on.

the valves and on the walls ofthe combus# tion chamber.

One form of device embodying my invention and in the construction anduse of which the objects herein set out, as well as others, maybeattained,fis illustrated in the accompanying drawings, in whichy Figure1 is a perspective view of a piston commonly used in internal combustionengines and embodying my invention.

Figure 2 is a view in section through a portion of .the cylinderandpiston of an internal combustion engine, said piston embodying myinvention.

It is a well known fact that carbon and other impurities collect to anobjectionable exten-t in most of the internal combustion engines in useat the present time, thereby preventing the most eiiicient results frombeing obtained in their operation, this deposit of carbon and otherimpurities creating a medium within the combustion chamber for takingand retaining heat suliicient to cause premature explosions in a mannerand at such times as'to greatly. reduce the efciency of the engine underthese condid0' tions. My invention provides a structure wherein thisdeposit of carbon and other impurities is greatly lessened, and in fact,

practically eliminated.

The piston of an internal combustion en-4 gine is very susceptible tothe deposit of carbon hereinbefore referred to, and I have, therefore,shown in the drawings herein my, invention as especially applied to suchpiston, in such drawings the numeral 5 indicating a fragment of acylinder within which a piston 6 is mounted to reciprocate in theordinary manner, said cylinder comprising a combustion chamber 7.

y In carrying my invention into effect I form an openin 8 through thepiston head 9, thls opening eing of a size closely ap'- piston, andwithin this opening 8 I place a dome or lining preferably constructed ofa metal to -which carbon deposits are little likely to adhere. Thisopening 8 is formed with ay recessed mouth 10 into which .the dome,hereinabove referred to, is forced under great pressure, lthe partsbeing so formed that after such pressure has been applied the dome willbe retained securely in place. In the preferred form of the structurethe recessed mouth is undercut to receive the edge of the dome which isforced tightly into place therein. This provides a structure that isvery simple in its construction and that completely forms the end orbottom wall of the opening within the piston. The temperature within thechamber in the piston being much less than that in the combustionchamber 7 and the dome being exposed to the fullv eifects of the fluidcontents within the chamber in the piston, said contents are made use ofto reduce the temperature of the dome and thereby maintain that wall ofthe combustion chamber formed by the piston head at a much lowervtemperature lthan would otherwise be obtained.

A ver eiective structure with the use of which t e results contemplatedmay be obtained comprises a dome or lining 11 containing a chamber 12,in the preferred form of construction, this dome being composed therecess 10 in the manner hereinabove described, the oute'r plate beingshaped in the general form of the outer end ofthe piston to rovide asmooth surface thereon.

`ill/bile myk invention is not confined to any specific metal' havingthe properties for resisting the 4deposit of carbon herein d escribed,yet I have found that fGerman s11- ver will produce extremelysatisfactory results.

I have illustrated and described my invention as applied to .that wallof the combustion chamber formed by the end of the piston but myinvention contemplates a structure in which other parts of the wall ofthe combustion chamber may receive my 1mproved lining.

In accordance with the provisions of the `patent statutes, l havedescribed the principles of operation of my invention, together `viththe device which I now consider to represent the bestembodiment/thereof; but ll desire to have it understood that the deviceshown is only illustrative, and that the invention I claim- 1. Thecombination in an internal combustion engine having a Ipiston\l chambertherein with a recessed Wall, of a liningY orlglnally larger in areathansaid recess but forced thereinto to secure it therein.

2. rlihe combination in an internal combnstion enginehaving a combustionchamber therein with a recessed Wall, of a lining comprising two piecesohmaterial formed with a space between them and originally larger thansaid recess, but forced thereinto to secure said lining in place.

3. fll.`he combination in an internal combustion engine having acombustion chamber therein with a recessed Wall, of a lining secoredinsaid recess and comprising tvvo may be carried out by other means.'

Lemme pieces of material formed to provide a cham ber between them.

4f. In combination in an internal combustion engine having a combustionchamber therein, a member reciprocatingly mounted in said chamber andforming a movable Wall thereof, which Wall has an opening formed'therethrough with a recessed mouth, and a.

lining secured in said recess.

5. 'llhe combination in an internal combastion engine having' acombustion chamber therein, of a piston mounted to reciprocate in saidchamber, said piston having a recessed openingv through its end, and alining comprising two pieces of material curved to form a chamberbetween them, said lining being secured in said recess.`

f5. rlhe process of forming a piston for an engine that consists inproviding a recess in the end of the piston, ormin a piece of materialhaving an area slightgly larger than said recess, and then forcing saidmaterial into said recess to form a lining.

rvrnnrnn nnnnv nnenrn.

